Keitaro Urashima, a young man who has failed the college exams three times, agrees to take over the Hinata Apartments from his grandmother Hina. He finds out the hard way that it is a women's-only dorm when the residents descend on him like angry hornets.
Hinata Apartments is in the red, forcing everyone to find jobs in order to pay the bills. Keitaro and Naru find work at Tokyo U, but Keitaro's employer Seta happens to be Naru's old tutor, and old crush. Kisune arrives in a desperate attempt to keep Naru and Seta from meeting again.
Seta falls into an underground cave during a dig. Keitaro brings Seta's American daughter Sarah to Hinata Apartments. Sara's shenanigans led Keitaro & Co. to the same cave where Seta is, reigniting Naru old feelings for him.
Haruka invites Keitaro and the Hinata Apartments residents to the Hinata Seaside Tea House. Much to their dismay, Keitao & Co. realize they are there not to enjoy the sea, but to be put to work. First, they must repair the dilapidated tea house. Second, they must rehearse for the Urashima family's annual production of the Chinese epic "The Journey West" for the local kids.